Head and shoulders view of Nikola Tesla in the 1880s at around the time he was developing the AC motor.
Diagram of Tesla's electro magnetic motor from his patent application.
A diagram showing the flow of hot air, through the hot rooms, cooling as it goes, and being extracted, to be replaced by fresh hot air in a continuous cycle.
Decorative grating over the stale air extraction duct at the Roman Baths in Jesus Lane, Cambridge (https://www.victorianturkishbath.org/_6DIRECTORY/AtoZEstab/England/CambJ/3BathsEng.htm)
#onthisday, 10 July 1856, Nikola Tesla was born. A #Serb physicist & engineer, he developed alternating current, without which Victorian #TurkishBaths would not have had efficient electric fans to remove sweat-laden air. Responsible for many other inventions but, happily, not the car. 🗃️ #C19th